Thanks for the links. I'll read them later.This thread got me researching US made tuna, and I ran across a greenpeace ranking of various brands for sustainability. My favorite, AmericanTuna tied for first place...
http://www.greenpeace.org/usa/oceans/tuna-guide/
I also came across this site...
https://cannedalbacoretuna.com/index.html
I'll probably check their fish out later